Negative working image recording material

Abstract

A negative working image recording material which comprises the following four components (A) to (D):(A) at least one of compounds represented by following general formulas (I) to (V), or at least one of polymers obtained by radical polymerization using at least one of monomers represented by following general formulas (VI) to (X):(B) at least one cross-linking agent;(C) at least one infrared absorbing agent;(D) at least one novolak resin.

What is claimed is:  
     
       1. A planographic printing plate material comprising an aluminum substrate and a negative working image recording layer provided on the substrate and comprised of the following four components (A) to (D): 
       (A) at least one compound represented by general formula (I), (II), (III), (IV) or (V), or at least one polymer obtained by radical polymerization using at least one monomer represented by general formula (VI), (VII), (VIII), (IX) or (X):                    
       wherein R 1 , R 2 , R 4  and R 5  each represents a hydrocarbon group which has not more than 20 carbon atoms and which is optionally substituted; R 3  represents a halogen atom, or a hydrocarbon group which has not more than 10 carbon atoms and which is optionally substituted, or an alkoxy group which has not more than 10 carbon atoms and which is optionally substituted; Ar 1  and Ar 2  each represents an aryl group which has not more than 20 carbon atoms and which is optionally substituted; R 6  represents a divalent hydrocarbon group which has not more than 20 carbon atoms and which is optionally substituted; and n represents an integer from 0 to 4;                    
       wherein R 7  represents a hydrogen atom, or a hydrocarbon group which has not more than 20 carbon atoms and which is optionally substituted; R 8  represents a single bond, or a divalent hydrocarbon group which has not more than 20 carbon atoms and which is optionally substituted; R 9 , R 11  and R 12  each represents a hydrocarbon group which has not more than 20 carbon atoms and which is optionally substituted; Ar 3  and Ar 4  each represents an aryl group which has not more than 20 carbon atoms and which is optionally substituted; R 10  represents a halogen atom, or a hydrocarbon group which has not more than 10 carbon atoms and which is optionally substituted or an alkoxy group which has not more than 10 carbon atoms and which is optionally substituted; R 13  represents a divalent hydrocarbon group which has not more than 20 carbon atoms and which is optionally substituted; n represents an integer from 0 to 4; X represents a single bond, —CO—O— or —CO—NR 14 —; R 14  represents a hydrogen atom, or a hydrocarbon group which has not more than 20 carbon atoms and which is optionally substituted; 
       (B) at least one cross-linking agent that is a phenol compound having not less than two hydroxymethyl groups or alkoxymethyl groups in the molecule and containing 3 to 5 benzene nuclei, and having a molecular weight of not more than 1,200;  
       (C) at least one infrared absorbing agent; and  
       (D) at least one novolak resin, whose molecular weight is 800 to 200,000 as expressed in weight-average molecular weight and 400 to 60,000 as expressed in number-average molecular weight.  
     
     
       2. A planographic printing plate material according to  claim 1 , wherein the polymer is a copolymer obtained by radical polymerization using at least one of the monomers represented by the general formulas (VI) to (X) and at least on monomer other than those represented by the general formulas (VI) to (X). 
     
     
       3. A planographic printing plate material according to  claim 2 , wherein the content of monomer units represented by the general formulas (VI) to (X) in the copolymer is 5 to 90% by weight. 
     
     
       4. A planographic printing plate material according to  claim 1 , wherein the molecular weight of the polymer is not less than 2000 as expressed in weight-average molecular weight and is not less than 800 as expressed in number-average molecular weight. 
     
     
       5. A planographic printing plate material according to  claim 1 , wherein the content of the compound or the polymer in the image recording layer is 0.01 to 50% by weight based on the total weight of solid components in the image recording layer. 
     
     
       6. A planographic printing plate material according to  claim 1 , wherein the phenol compound has an alkoxymethyl group. 
     
     
       7. A planographic printing plate material according to  claim 6 , wherein the number of carbon atoms in the alkoxymethyl group is not more than 6. 
     
     
       8. A planographic printing plate material according to  claim 1 , wherein the content of the phenol compound in the image recording layer is 5 to 70% by weight based on the total weight of solid components in the image recording layer. 
     
     
       9. A planographic printing plate material according to  claim 1 , wherein the infrared absorbing agent is a dye or a pigment having maximum absorption at wavelengths of 760 to 1200 nm. 
     
     
       10. A planographic printing plate material according to  claim 9 , wherein the dye is a substance selected from the group consisting of cyanine dyes, squarylium dyes, pyrylium salts and nickel thiolate complexes. 
     
     
       11. A planographic printing plate material according to  claim 9 , wherein the pigment is carbon black. 
     
     
       12. A planographic printing plate material according to  claim 9 , wherein the particle size of the pigment is 0.01 to 10 μm. 
     
     
       13. A planographic printing plate material according to  claim 9 , wherein the content of the dye or the pigment in the image recording layer is 0.01 to 50% by weight based on the total weight of solid components in the image recording layer. 
     
     
       14. A planographic printing plate material according to  claim 1 , wherein the content of the novolak resin in the image recording layer is 5 to 90% by weight based on the total weight of solid components in the image recording layer.